So finally got NextCloud working again. And i figured i'd post some notes about how here, for my own future reference, and as tip for anyone else perhaps facing the same problem.
I apologize for not making the answer more detailed and way less messy. But i messed around so much i'm not even entirely sure if i'm perhaps missing one or more points in this.
Installed Arch packages:
php7 php7-apache php7-apcu php7-fpm php7-gd php7-igbinary php7-imagick php7-imap php7-intl php7-memcache php7-memcached php7-pgsql php7-redis php7-sqlite php7-xsl
(These might depend on the Nextcloud apps desired/installed See Nextcloud prerequisites for more detail.)
Check (and edit) /etc/php7/php.ini for required php extensions:
Add any missing php extensions/modules.
$ php7 -m # confirm that the needed modules are enabled [PHP Modules] bcmath bz2 Core ctype curl date dom exif fileinfo filter ftp gd gmp hash iconv igbinary imagick imap intl json libxml mbstring mysqli mysqlnd openssl pcntl pcre PDO pdo_mysql Phar posix readline redis Reflection session SimpleXML SPL standard tokenizer xml xmlreader xmlwriter Zend OPcache zip zlib [Zend Modules] Zend OPcache
Enable and start php-fpm7:
$ sudo systemctl enable php-fpm7.service && sudo systemctl start php-fpm7.service
(note: I also disabled php-fpm.servicesince nextcloud is the only thing used in my case, though this might be unnecessary)
Add this to the Apache virtualhost running nextcloud:
<FilesMatch \.php$> SetHandler "proxy:unix:/run/php-fpm7/php-fpm.sock|fcgi://localhost/" </FilesMatch>
Fix nextcloud systemd cronjobs:
Simply change php to php7 in /etc/systemd/system/nextcloudcron.service.
ExecStart=/usr/bin/php7 -f /srv/http/nextcloud/cron.php
Restart the necessary services, or reboot server.
That should do it..I think..
